condition mean min max 4 h after light 2723.5 2723.5 2723.5 8 h after light 2537.0 2502.6 2571.4 12 h after light 2445.9 2385.8 2506.0 4 h after dark 2619.75 2425.7 2813.8 8 h after dark 2752.3 2558.6 2946.0 12 h after dark 2567.5 2387.7 2747.3